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Magnetic Relaxation in TbIII Magnetic Chains with Nitronyl Nitroxide Radical Bridges That Undergo 3D Antiferromagnetic Ordering

Authors

  • Haixia Tian,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Xiufeng Wang,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Xuelan Mei,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Ruina Liu,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Mei Zhu,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Congming Zhang,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Yue Ma,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Licun Li,

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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  • Daizheng Liao

    1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry and Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry, Nankai University, Tianjin 300071, P. R. China
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Abstract

Two new one-dimensional nitronyl nitroxide radical–LnIII chain complexes, [Gd(hfac)3(NIT-I)] (1) and [Tb(hfac)3(NIT-I)] (2) (hfac = hexafluoroacetylacetonate; NIT-I = 2-iodo-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide), have been synthesized. Both complexes have linear chain structures in which the NIT-I radical ligands link the Ln(hfac)3 units through the oxygen atoms of the nitronyl nitroxide groups. Direct-current magnetic studies show that the Gd complex is paramagnetic above 2.0 K, whereas the Tb complex exhibits 3D antiferromagnetic ordering with TN = 4.0 K. Furthermore, complex 2 possesses frequency-dependent ac magnetic susceptibilities, which suggests slow magnetic relaxation.

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